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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-07-23 21:27:08 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:15 -0700 |
| commit | a1f242ff460e4b50a045fa237c3c56cce9eabf83 (patch) | |
| tree | 657766b55251042b38967422dc9c3ea893b98747 /arch/powerpc/Kconfig | |
| parent | use generic_access_phys for /dev/mem mappings (diff) | |
| download | linux-dev-a1f242ff460e4b50a045fa237c3c56cce9eabf83.tar.xz linux-dev-a1f242ff460e4b50a045fa237c3c56cce9eabf83.zip | |
powerpc ioremap_prot
This adds ioremap_prot and pte_pgprot() so that one can extract protection
bits from a PTE and use them to ioremap_prot() (in order to support ptrace
of VM_IO | VM_PFNMAP as per Rik's patch).
This moves a couple of flag checks around in the ioremap implementations
of arch/powerpc. There's a side effect of allowing non-cacheable and
non-guarded mappings on ppc32 which before would always have _PAGE_GUARDED
set whenever _PAGE_NO_CACHE is.
(standard ioremap will still set _PAGE_GUARDED, but ioremap_prot will be
capable of setting such a non guarded mapping).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 4d7e2ba10bae..a487671c282f 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -111,6 +111,7 @@ config PPC select HAVE_DYNAMIC_FTRACE select HAVE_FTRACE select HAVE_IDE + select HAVE_IOREMAP_PROT select HAVE_KPROBES select HAVE_ARCH_KGDB select HAVE_KRETPROBES |